Universität zu Köln

Hess, Melissa ORCID: 0000-0002-9255-7185, Roeben, Eric, Habicht, Axel, Seiffert, Sebastian ORCID: 0000-0002-5152-1207 and Schmidt, Annette M. (2019). Local dynamics in supramolecular polymer networks probed by magnetic particle nanorheology. Soft Matter, 15 (5). S. 842 - 851. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1744-6848

Full text not available from this repository.

Abstract

Transient supramolecular polymer networks are promising candidates as soft self-healing or stimuli-sensitive materials. In this paper, we employ a novel nanorheological approach, magnetic particle nanorheology (MPN), in order to better understand the local dynamic properties of model supramolecular networks from a molecular point of view. Hence, the bond strength between four-arm star-shaped polyethylene glycol (PEG) functionalized at the four extremities with terpyridine ligands is tuned by implementing different metal ions with variable complexation affinities for the ligand. We show that MNP allows for the evaluation of the strength and connectivity of the polymer networks by the estimation of relaxation times, mesh size, and also the viscoelastic properties of these materials. These results are compared and complemented to former outcomes on these systems that were obtained by macroscopic analytical methods. A clear dependence between the strength of the metal-ligand complex and the local dynamics of the polymeric network is observed by the nanorheological approach, which is in good agreement with previous predictions related to the complex formation constants.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hess, Melissa UNSPECIFIED orcid.org/0000-0002-9255-7185 UNSPECIFIED Roeben, Eric UNSPECIFIED UNSPECIFIED UNSPECIFIED Habicht, Axel UNSPECIFIED UNSPECIFIED UNSPECIFIED Seiffert, Sebastian UNSPECIFIED orcid.org/0000-0002-5152-1207 UNSPECIFIED Schmidt, Annette M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-156892
DOI:	10.1039/c8sm01802b
Journal or Publication Title:	Soft Matter
Volume:	15
Number:	5
Page Range:	S. 842 - 851
Date:	2019
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	1744-6848
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HOST-GUEST; GELS; CONSTRUCTION; HYDROGEL; BOND Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Multidisciplinary; Polymer Science Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15689